Figure 1From: Changes of activity and isoforms of alkaline sphingomyelinase (nucleotide pyrophosphatase phosphodiesterase 7) in bile from patients undergoing endoscopic retrograde cholangiopancreatography Correlation of NPP7 activities in bile expressed as per ml and per mg sample protein. NPP7 activity was determined using 14C-labeled sphingomyelin as substrate and the activities were expressed as the cleaved phosphocholine per ml of the bile and per mg of the bile proteins.Back to article page